<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>  
            <div class="area">
                <div class="title area border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" 
                    v-for="item of hot" 
                    :key="item.id"
                    @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
                <div class="title area border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"  
                    v-for="innerItem of item" 
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'
export default {
    name:'CityList',
    props:{
        cities:Object,
        hot:Array,
        letter:String
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    methods: {
        handleCityClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
       ...mapMutations (['changeCity'])
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper)
    },
    watch: {
        letter () {
            if(this.letter) {
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    }
}
</script>
<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color #cccccc
        &:after
            border-color #cccccc
    .border-bottom
    &:before
        border-color #cccccc
    .list
        overflow hidden
        position absolute
        top 1.58rem
        left 0
        right 0 
        bottom 0
        .title
            line-height .54rem
            background #eeeeee
            padding-left .2rem
            color #666
            font-size .26rem
        .button-list
            overflow hidden
            padding .1rem .6rem .1rem .1rem
            .button-wrapper
                float left
                width 33.33%
                .button
                    margin .1rem
                    padding .1rem 0
                    text-align center
                    border .02rem solid #cccccc
                    border-radius .06rem
        .item-list
            .item
                line-height .76rem
                color #666
                padding-left .2rem



</style>